Question about patents

I have an innovative product that I have developed that I want to introduce to some local retailers, but I don`t know if it is patentable or not. There is nothing actually new or inventive about the product itself...it is an existing idea combined with an existing product, and together they combine to be an innovative product idea that is nowhere on the market. If I have a product that is to be specifically used in such a way that no other product is used, can that be patented?Thanks for your help!